(19)
(11) EP 0 833 151 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
09.04.2003 Bulletin 2003/15

(43) Date of publication A2:
01.04.1998 Bulletin 1998/14

(21) Application number: 97307213.5

(22) Date of filing: 17.09.1997
(51) International Patent Classification (IPC)7: G01N 29/10, G01N 29/24
(84) Designated Contracting States:
AT BE CH DE DK ES FI FR GR IE IT LI LU MC NL PT SE

(30) Priority: 27.09.1996 GB 9620229

(71) Applicant: Graphers Systems Limited
Moulton, Suffolk CB8 8RT (GB)

(72) Inventor:
  • Perryman, Raymond Andrew George
    Moulton, Suffolk, CB8 8RT (GB)

(74) Representative: Jones, Graham H. 
Graham Jones & Company Blackheath 77 Beaconsfield Road
London SE3 7LG
London SE3 7LG (GB)

   


(54) Apparatus for measuring the quality of spot welds


(57) Apparatus (2) for measuring the quality of spot welds, comprising a housing (4); a fluid medium (6) in the housing (4); transmitter means (8) for transmitting at least one ultrasonic pulse through the fluid medium (6) to a spot weld (10), the ultrasonic pulse then reverberating in the spot weld (10); and receiver means (16) through which the ultrasonic pulse passes on its way to the spot weld (10), the receiver means (16) being ultrasonically sensitive so that it is able to receive echoes from the spot weld (10) by the reverberation of the ultrasonic pulse in the spot weld (10), the receiver means (16) comprising a plurality of ultrasonically sensitive elements (18), and the receiver means (16) being such that during use of the apparatus (2) the receiver means (16) is located adjacent the spot weld (10).






Search report